A 1997 model year vehicle would use R134a refrigerant. Freon is a registered trademark of DuPont for a line of CFC and HFC refrigerants they manufacture and market, so it's not actually Freon unless manufactured by DuPont and marketed under that name.
R134a
Freon is R12. Your 1997 Chevy uses R134 Refrigerant.
R134a
R134a
R134a
134a
R134A
134a
Recommends a 10-30 weight motor oil for its Montero sport model. A heavier weight oil can be used in extremely hot climates.
R - 134a
R-134a
R134a